Oil cooling system



y 4, 1932- B. LO EFFLER 11,860,150

OIL COOLING SYSTEM Filed March 21, 1950 INVENTOR Laefl'ier;

m ATTORNEYS Patented May 224, 1932 NET BRUNO LOEFFLER,

OF PLAINFIELD, NEW JERSEY, ASSIGN'OR TO INTERNATIONAL MOTOR COMPANY, OFNEW YORK, N. 'Y., A CORPORATION OE DELAWARE OIL COOLING SYSTEM- IApplication filed March 21, 1930. Serial l lo. 437,796.

The present invention relates to systems for cooling oil and embodies,more specifically, an improved cooling system for the lubricating oil ofa motor vehicle, such system embodying an efiective cooling mechanism bymeans of which the oil may be cooled when it reaches a predeterminedtemperature, the cooling mechanism being rendered inoperativeautomatically upon a predetermined fall in temperature of thelubricating oil.

The desirability of maintaining the temperature of the lubricating oilof a motor vehicle within predetermined limits wil1 be readily apparentand the present invention relates to a mechanism for effecting suchdesired condition, it being understood that the mechanism is to beadapted for use with any form of vehicle and readily incorporated in thevehicle design.

An object of the invention is to provide an oil cooling system for amotor vehicle which functions independently of the pressure feed systemfor lubrication of the moving parts of the vehicle.

A further object of the invention is to provide a device of the abovecharacter by means of which the temperature of the oil may be controlledautomatically, it being contemplated herein to provide a thermostatsubmerged within the oil to control the operation of the cooling system.

' A further object of the invention is to provide a device of the abovecharacter which is automatically rendered inoperative when the engineoil is cold, thus not imposing a constant load upon the vehicle drivingmechanism. 1

Further objects, not specifically enumerated above, will be apparent asthe invention is described in greater detail in connection with theaccompanying drawing, wherein the single figure is a view in sectionshowing an oil cooling system constructed in accordance with the presentinvention.

Referring to the above figure, the engine crank case or other oilreservoir is shown at a within which a supply of lubricating oil b ismaintained. The maximum oil level in the reservoir is indicated at Iwhile the minimum oil level is indicated by the dot and dash lines 6 Apressure feed system for lubricating the g vehicle includes a support 0within which a shaft 0 is journaled. A gear 0 is provided on the shaftand is adapted to be driven by the engine in any approved fashion.Within the support 0, a chamber 0 is provided, preferably being formedto receive a pumping gear 0 which pumps oil into conduit 0 and duct 0 tocarry the oil to the bearings to be lubricated. A pressure relief valve0 is provided to return the lubricant to thereservoir through port 0 inthe event that the pressure within the duct 0" mined maximum Value.

A closure 0 is provided for the chamber 0 and carries a screening device0 by means of which the oil pumped by the gear 0 may be filtered priorto being introduced into the conduit 0 The foregoing pumping mechanismmay be varied in construct-ion as desired and forms no part of thepresent invention.

Independent of the pressure system dereaches a predeter-' scribed above,a support (Z is provided in the reservoir carrying a shaft d which isprod is mounted, this gear being driven by so shaft d in a manner whichwill be readily apparent. Conduit 0Z communicates with a duct (i whichcarries the oil to chamber d through which a plurality of pipes dextend. Manifolds d and let and exhaust pipes 01 and d, respectively,and carry a supply of cooling fluid to the chamber 0Z After circulating1about the pipes d the oil is returned to e reservoir through pipe d.

A ciosure e is provided for the chamber d a screening device 6' beingmounted thereon to screen the oil prior to introducing it into the pumpand cooling system described above.

al communicate with in- Also carried upon the closure 6 is a chamated bya thermostatic element 6 in such manner that below a. predeterminedmaximum temperature the chamber d communicates directly with the oilreservoir and serves as a by-pass for the oil, thus causing the pumpto'do practically no Work under these conditions. When the temperatureof the oil reaches the foregoing predetermined maximum, the thermostathas expanded sufficiently to' cause the closure e to close, the aperture0 thus forcing the oil through the pipes d and d and the cooling chamber(i From the foregoing, it will be apparent that a cooling system hasbeen provided which functions automatically to cool the oil under properconditions. Unnecessary load upon the engine is'relieved when the oil iscooled by means of the thermostatically operated valve and thus aneflective and highly eflicient coolingsystem is provided.

ile the invention has been described with specific reference to theaccompanying drawing, it is not to be limited, save as defined in theappended claims. I claim as my invention: 1. In combination with an oilreservoir having a pressure feed system, a cooling device, a support inthe reservoir formed with a chamber, a pump in the chamber, a conduit inthe support, means including the last named means to carry oil betweenthe reservoir and coolin device, a bypass between the reservoir ancommunicating means, and a thermostatically actuated valve in thebypass. 2. In combination with an oil reservoir having a pressure feedsystem, a cooling-'device, a support in the reservoir formed with achamber, a pump in the chamber, a conduit in the support, meansincluding the last named means to carry oil between the reservoir andcooling device, and a bypass in the I sup ort.

T is specification signed this 15th day of March, A. D. 1930.

BRUNO LOEFFLER.

